Hinged last



UNITED STATES PATENT EEIcE.

CHARLES E. KERSHAW, 0F MANCHESTER, NEW HAlMEPSHIRE.

HING-ED LAST.

Specification of Letters Patent. I Patented July 29, 1919,

Application filed October 20, 1915. Serial No. 56,858.

yfacilitate removal of the last from a shoe containing the same. Frequent breakage of such lasts occurs under the conditions of use, especially in certain of the machines that are employed in the manufacture of shoes and in which pressure and other strains are applied to the last. Such breakage usually occurs at the hinge itself, and adjacent thereto where the last-parts are weakened because of the cutting away of the wood to receive and fit the hinge.

Ijlhe general objects of the present invention are to provide a hinge which in itself will be strong and durable, to securely anchor the straps or leaves of such hinge in the last-parts with a minimum of cutting away and weakening of the wood of the last-parts, and to so distribute the stresses to which the last is subjected in use that they shall be efliciently sustained by the last.

The `present invention, in general terms, consists in a hinged lastcomprising a heelpart and a fore-part connected by a hinge,

and characterized byhaving the straps or leaves of vsuch hinge contained in mortises opening only at the meeting faces of the said parts, and the knuckle of the hinge seated in opposed 'concave lseats formed in the said meeting faces, with the integrityI of each part maintained entirely varound the' corresponding hinge-strap or leaf.

In the preferred embodiment of the invention lthe V,hinge-straps or leaves are held in the mortise's under tension, thus keeping the knuckle ofthe hinge rmly against the seats provided therefor. In such embodiment, the

l' knuckle rather than the hinge-straps or leaves supports the last against shear on the plane of division between the last-sections; that is to say, the knuckle acts as a key seated in both sections and preventing relative vertical movement of the last parts.,

The nature and 'objects et the invention will .appear morev fully from the following specification and accompanying drawings.

In the drawings,' y Figure 1 is a perspective view of a last embodying my inventlon.

Fig. 2 is a plan View partly in horizontal section in the plane indicated by the line -2-2, Eig. 1.

i Fig. 3 is a view in vertical section longitudinally of the last.

Fig. 4c is a front view of the heel-section. Fig. 5 is a view of a slightly modified hinge, shown separately.

Fig. 6 showsanother modiiication.

Figs. 7 and 8 are edge'y and plan views of oneleaf of another modiiied hinge.

Having reference to the drawings,-

The heel-part or heel-section is'marked 1, and the fore-part or toe-section is marked 2. The heel-part is provided as usual with a hole 5 for the reception of the heel-pins of thedvarious machines in which the last ris use Referring first to Figs. 1 to 4, the hinge shown therein comprises, essentially, the oppositely extending straps or leaves 6, 7, and the so-called journal 8, which latter is combined with the said straps or leaves in a manner to provide pivotal connections between them, and is so formed as to provide an extended cylindrical bearing-member interposed between the last-sections, whereby the said sections will be held in proper relation to each other adjacent the pivotal axis. .The mee-ting faces of the respective last-sections are formed with opposed transverse seats 10, 11, to receive the journal 8. As shown best -in Figs. l to 3, the journal is of a generally cylindrical shape, and is rigidly connected with the strap 6, and pivotally engaged with the strap 7. The strap 6 is made rom a wire bent to U-shape with Vthe ,free endsy of its arn'is entered into holes in the journal at opposite sides of themiddle of thelength t ereo'f, a11d secured therein by riveting, at 12, 12, Fig. 2. The strap' 7 consists of a strip of material bent to approximately U-shape nach inerti-se by e wedge er taper-spin 1.6 td

ting a hole l17 extending inwardly, preferably from the bottom of the last, and at a righteangle t'o-th'efp'lane ofthe mortise 15. Such taper-pin extends through the opening of the strap 6 and when driven into placeV4 acts as a wedge to draw theI strap into the mortise andthe journal :8 tightly against lthe seat l0. It serves to hold `and lock .the. sa i d parts rigidly in place. YThe toe-section 1s4 rsimilarly mortised, asindicated at 18, to 'recieve the hingestrapf?, j which strap -is anchored by a 'wedge or taper-'pin 19 fitting a hole20 entring the bottom of the last and extending at substantiallya right-angle to theplane of thc.mortisef1 8 The vinner* face o fgthestrapor .leaf7 is beveled or rounded so that a sloping or rounded surfaceyinstead of a square edge is `presented Vto the taper-pin as it isdriven into position. .The outery portionsoftheholes 17, 20, may be closed by fwoodenplugs-2L 22, as shown, ,afterthe taper-pins are driven. intov position. Such plugs may vbe:removed. and thetaper-pins drivenI fartherV in whenever it becomes necessary to takeupfslack or. Ilooseness duev to shrinkageof the wood. In `order that the ,taperepins may be-removed 'to releasethe .hinge-straps, should occasionrequirefor rei pajir of thelast or otherwise, tapped holes are' ,.providcd .in thc butt ends ofthe taperpins as indicated at 14, 14, F1 g. 3.

The arms of the strap l"l" preferably diverge toward the free extremities thereof, vso that ywhen such strap is drawn into its llastsection under tension the pivoted ends f will be drawn tightly against the end of the body-portion of the .knuckle to give firmvnessand rigidity to the hinge, and prevent looseness of the joint, and' s0 as tov produce friction .between the parts of the hinge whereby ,a certain stiffness will be givento the joint and thus resistance will be offered lto--fieiring of the last. The, integrity of the wood composing the last-sections is maintained laterally of the vn n ortis'. es. There is, therefore, very little 4cutting away ofthe wood of the last-secf tions, and sfuchcutting away as is necessary ofsuch a nature that it weakens ,the last asf. little .as possible. l,anchored well-.within the strong body-por- Thehinge-straps are tions y'of thevflast-parts.. Preferably. the

'hingefstraps yfit somewhat loose vertically in i: L 'the mortises. so .that they can have notendencyto split the-sections :when drawn into su' c h mortis es. When the hinge-straps are Vinto .the mortises 4.under tension; and molosed therein, the' knuckle isfheld in ffirm 'engagementwth both er'. theseats 1o and v11.

.There ,i's,'therefore, no bending forcel exerted uponthel hinge-strapsl during use of the last, thefbenjding forcel exerted .upon the last .being rsiste/by the'knuckl ,Y

@..ioanal 151.1 eine@ .with a .entrai anflange which fits corresponding anvnular recess 23a, Fig. 4, in the last-sections, suchl fiangeactingl-.as a key to prevent relative lateral movement of the last-sections. Fig. 5 illustrates a hinge in which the journal, there marked 25, is formed without such flange, the form v.of hinge shown in Fig. 5 being somewhat more cheaply manufactured than that of Figs. 1 to 4. The hinge-straps26,27,.,of Fig. -5 are connected to the journal asin the em- .bodiment first described. Fig. 6 shows a construction of hinge in which both strapsor. leaves 36, 37, are formed with eyes in the eztremities ofthe arms thereof, fitting upon Ithe gudgeons 13,113, of the journal v35.

Figs'. 7 and 8,-show .the journal or knuckle45, the strap or leaf46, and the :gudgeons 43, 43,

`all formed in ,oneV piece, with a`holej47 in .said strap .or leaf for Vthe taper pin 16.

.T he. journal of each of the constructions which have' been describedis connectedrig- Y idly toone last-section by means ofthe rigidly-attached strap Yor leaf 6, and presents a.

smooth bearing surface to. the other last-section, and theengagement of such j ournalwith the seats thereforformed in the respective vsections is such that the'journal actsas a key .between-the two sectionstoresist the. shearing stresses in the planeof division between the sections. The length ofthe journalinay Vbe varied.. In consequenceof being rigidly connected with strap or leaf .6, journal' 8 does not turn in.` the seat 10 of the heel-part.

Consequently, the said seat 10 constitutes in .seats .and also having leaves or straps occupying said `vmorti'ses, and means engaging .with the said leaves .or straps and holding the seats and-journal firmlyfengaged with one another at both sides ofthejournal and adapted for adjustably Vtightening up vthe fitof s aid-journalfand seats. i

2. vA hinged last having-the heel-part and fore-part thereof united by a knuckle-joint hinge-connection comprising -cylindroconveny and cylindreconcave bearingfportions fittingy together, and having combinedwith the said velements means for yadjustably Y ttt-fhtening .up. the t. of the said-.bearingportions.

.3. hinged last comprising, in, combination, a heel-section, a toe-section, saidsections respectively having knuckle-seatsgand mortises, a hinge comprising a knuckle extightening pins engaging the loops of said tending transversely of the last engaging straps and by which the same are held in the seats in the meeting faces of both sections, last-sections and the knuckle and seats are and having gudgeons at the ends of its bodykept together. u

5 portion, and oppositely extending U-shaped In testimony whereof I ailX my signature 15 straps entering mortises in said section, one in presence of two Witnesses.

strap rigidly secured to said knuckle at the CHARLES E. KERSHAW. ends of its arms and the other strap having Witnesses: i diverging arms with eyes in the ends there- CHAs. F. RANDALL.

10 oi' fitting upon said gudgeons, and tapered ELLEN O. SPRING.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents,

Washington, '.D. C. 

